AAR fiberglass hood issues ...

Most folks know that (production) fiberglass parts come from a mold.
Production parts are rarely hand laminated, they are made with a "chopper gun" that spits out glass fibers and resin at same time. This is perfectly ok for parts that don't require super high strength, but this method tends to be "resin rich". With hand laminating, you're able to regulate the resin content more closely.
The reason this is relevant is because resin builds heat when it cures. The higher the resin content, the higher the heat build up. When you are in a production environment, you're expected to make parts fairly fast, requiring that you mix your resin batches fairly hot (more catalyst) to harden faster. Also, I'm betting that the parts aren't staying in the molds for full cure time, which is a full 24 hrs. If the parts are pulled before curing (cooling down) they warp, guaranteed.
Further more, without REALLY good framework on the mold, IT will eventually start to warp from the cyles of heating/cooling over time.

Sadly, once those stringers (braces) are glassed to the underside of hood, thats it, she no move, bend, or sag. Don't believe? go look at a AAR Cuda or TA Challenger with original hood. Almost 40 and still bowed, right? Cutting the braces, re-stressing and re-glassing would help alot, but thats not for the faint of heart .

Hope this sheds some light on a dark subject.
aloha-pauly